I don' know what to tell you...I feared the same thing and my H has taken some things from the garage that I would not classify as "his"....I had changed the locks after he brought OW here... a couple of weeks later I got D papers in the mail...not sayin' that is what promted him...just putting it out there.
Does he know you are headed out of town? I would suggest that you take pics of stuff with a digital camera...if it is gone when you get home...you will have proof!
If you are trying to save your M...be careful about what sets you off...stuff is stuff....don't fight over the little things...otoh...he left and has no right to come and take what he wants...
Erase the history off the computer or put a password on it so he cannot get on it!!!! Go and have fun!!!
M48 H53 M16 T18 S16 D13 SS30 H drops bomb PA/8-30-09 H leaves 12-30-09 D filed by H 2-10 H asks to come home 4-11 Piecing